W50 Leveling bed issue / take to much time ... here try this
1. Update to last firmware
2. If you get stuck in a loop of leveling hell shutdown the printer.
3. Try to make it again should work if not shutdown again then loose the 2 adjustment numb a full turn then try again.
Updating the firmware is very important since one of the versions has a bug with the calibration on the right thumbscrew.